User`s guide

4-40 Display Terminals
The main Trend Data screen shows a menu with the names of the
12 trend variables as defined in the display configuration.
2. Use the
and keys to move the highlight bar to the trend
variable you want to view. Trend 8 in Figure 4-26 is an example
of a mismatch between the trend variable definitions in the display
and controller configurations. The highlight bar skips over
Trend 8 to prevent you from selecting it.
3. Press the
key to confirm your selection. The next screen that
appears depends on whether you selected an analog trend variable
or a digital (logical) trend variable. These screens are described
under the subheadings Viewing and Editing Analog Trend and
Viewing Digital Trend in this chapter.
4. Press the
esc
key after viewing the Trend data to return to the Main
menu.
Viewing and Editing Analog Trend
Note: There are three fields in the Analog Trend screen that can be
edited if you have a Level 1 or Level 2 password: high range
value, low range value, and the display mode.
To view and edit Analog Trend:
1. Use the
and keys to move the selection to the field you want
to edit. The current selection is indicated by a filled triangle (
)
shown to the left of the field.
2. Press the
key to begin the edit sequence. A flashing underline
cursor appears under the triangle (
) to indicate that the value can
be changed.
3. Use the
or key to increase or decrease the value of a
numeric field. Either key toggles the display mode value.
4. Press
again to confirm the new value. The flashing cursor
disappears, and the entire plot is redrawn using the new value. The
new value is stored in non-volatile memory of the DX LCD
Display and is reused any time you display this analog trend
(e.g., after a power failure or in subsequent sessions).
Note: Press the
esc
key at any time to abort the edit sequence.
5. Repeat Steps 1 to 4 for any other of the fields you want to change.
6. Press the
esc
key when you have finished viewing the analog trend
data to return to the main Trend screen.